The author sets out a systematic account of military organization for war, explaining aims of organization and the chain of command and detailing the roles and typical structures of arms such as cavalry, artillery, engineers, and infantry. He examines unit composition, emergent troop types and combined formations from divisions to armies, and the functions of staff and war establishments. A large section outlines British expeditionary and administrative systems, including transport, supply, medical, veterinary, ordnance, railway, works, postal, and accounting services, plus territorial and colonial forces. Comparative sketches of other national organizations and a concise history complete a pragmatic survey linking organizational principles to command psychology.